Mixed disazo dye and process of making same.



UNTTEE STATES CONRAD SCI-IRAUBE AND PATENT OFFICE.

WALTER VOIGTLANDERTETZNER, OF LUDWIGS- HAEEN-ON-THE-RHI NE, GERMANY, ASSIGNORS TO BADISOHE ANILIN AND SODA FABRIK, OF LUDWIGSHAFEN-ON-THE-RHINE, GERMANY, A CORPO- RATION OF GERMANY.

MIXED DISAZO DYE AND PROCESS OF MAKING SAME.

SPECIFICATION forming part of Letters latent No. 718,028, dated January 6, 1903. Application filed November 6,1900. Serial No- 35,666. ($pecin1ens.)

To atZZ whom it may concern:

Be it known thatwe, CONRAD SCHRAUBE, doctor of philosophy, a subject of the King of Prussia, German Emperor, and WALTER 5 VOIGTLANDER -TETZNER, doctor of philosophy, a subject of the King of Saxony, both residing at Ludwigshafenson-the-Rhine, in the Kingdom of Bavaria and Empire of Germany, have invented new and useful Imro provements in Mixed Disazo Coloring-Matters, of which the following is a specification.

The tetrazo compound of 1.5 naphthylenediamin has prior to our invention only been used for the manufacture of a series of substantive azo coloring-matters for cotton. We have discovered that the mixed disazo dyes that can be obtained from this tetrazo compound and which contain salicylic acid as one component are excellent dyes for use in connection with metallic mordants on wool.

These dyestuffs have the formula N N c H /OH 6 c..,H 1 coon where Y denotes an azo component other than salicylic acid. We have further found that these coloring-matters can best be manufactured by combining one molecular proportion 3 of the tetrazo compound with one molecular proportion of salicylic acid in alkaline solution and subsequently combining the intermediate product thus obtained, which still contains a free disazo residue, with the final component chosen. The final component se- The coloring-matters obtained in accordance with our invention can be used for dyeing chrome-mordanted wool or they can be dyed on wool in the acid-bath and subsequently suitably treated with a chromate or a suitable chrom'e-oxid salt. In either case the dyeings possess a high degree of fastness against fulling.

The following examples will serve toillustrate the manner in which our invention can best be carried into practical efiect. The parts are by weight.

Example 1: Production of the coloring-mat- 5 5 tersalicylic acid 1.5 naphthy1ene-cliamin 2.3.6 naphthol-disulfo-amd (sodium salt.) Prepare the tetrazo solution from two hundred and thirty (230) parts of 1.5 naphthylene-diamin hydrochlorate, which may be done in the well-known way. (See German Patent No. 39,954.) Run this into a solution of one hundred and thirty-eight (138) parts of salicylic acid in five thousand (5,000) parts of water containing eight hundred (800) parts of calcined soda. Stir the solutions thoroughly while adding the one to the other and for about a quarter (i) of an hour after. By this time the intermediate product is usually formed and no unchanged tetrazo compound should be present. The mixture thus obtained contains in suspension the intermediate product from one hundred and fifty-eight (158) parts free 1.5 naphthylene-diamin and one hundred and thirty-eight (138) parts of salicylic acid. To this mixture add about three hundred and fifty (350) parts of 2.3.6 naphthol-disulfo-acid (sodium salt) dissolved in three thousand (3,000) parts of water. Stir for several hours. The coloring-matter separates out or can be precipitated by common salt and collected in the usual way.

Example 2: Production of the coloring-matter- 1.5 naphthylene-diamin and thirty (230) parts of 1.5 naphthylene-diamin hydrochlorate into a solution of one hundred and thirty-eight (138) parts of salicylic acid in five thousand (5,000) parts of Water containing six hundred and thirty (630) parts of calcined soda. Stir the mixture thoroughly until the tetrazo compound has disappeared. Then add sufficient acetic acid to render the solution Weakly acid. Then run in a solution of two hundred and twenty-three (223) parts of 2.5 naphthylamin sulfo-acid in three thousand (3,000) parts of water containing one hundred and forty (140) parts of crystallized sodium acetate. Stir the mixture for about twelve (12) hours. Then add carbonate of soda un til the reaction is alkaline, precipitate the coloring-matter by means of com mon salt, and collect it by filtering.

Example 3: Production of the coloring-matter ,salicylic acid 1.5 naphthylene-diamin 1 5 n lphthylene diamin Prepare the intermediate product from two hundred and thirty (230) parts of 1.5 naphthylene-diamin hydrochlorate, one hundred and thirty-eight (138) parts of salicylic acid in the manner described in Example 2. Add suflicient hydrochloric acid to the mixture to render it weakly acid, and then add an aqueous solution of two hundred and thirty-two (232) parts of 1.5 naphthylene-diamin hydrochlorate. Stir until the combination is complete, add carbonate of soda to render the solution alkaline, and collect the precipitated coloring-matter.

Similarly coloring-matters can be obtained by using any of the well-known azo-dye components, such as phenol, resorcinol, the sulfo-acids of naphthylamin, naphthol, amidonaphthol, dihydroxy-naphthalene, and the like.

Our new coloring-matters, that we desire to claim, are mixed disa'zo dyes, having the which upon reduction yield 1.5 naphthylenediamin, amido-salicylic acid, and the reduction product due to the presence of the other component used. Thus the disazo dyes from the 1.5 naphthylene-diamin, salicylic acid, and a naphthol sulfo-acid yield upon reduction 1.5 naphthylene-diamin, amido-salicylic acid, and amido-naphthol sulfo-acid. If the Final component of coloring-matter, (Y.)

Dyes wool from the acidbath.

After treatment with b i c h r omate.

Phenol Olive-yellow. Yellow-brown.

Resorcinol Brown-orange Brown.

Meta-phenyl Brown-yellow Yellow-brown.

sulfo-acid.

Meta-toluyl e n e d i a mi n Brown-orange. Brown.

monosulfo-acid.

1.3.6 amido-phenol sulfo- Brownish orange. Brown.

acid.

1.3.4 damido phenol sulfo- Brown-yellow Yellow-brown.

aci

1.4 naphthylamin sulfo-acid 2.5 naphthylamin sulfo-acid 2.6naphthylamin sulfo-acid Brown-red. Orange-brown. Orange-brown.

Brownish red. Brown sh orange. Brownish orange.

1.3.6 naphthylamin disulfo- D u 11 I e d dis h Yellow-brown.

acid. brown. 1.5.7 naphthylamin disulfo- D u 11 r e d d i s h Yellow-brown.

' brown.

acid. 2.3.fifiaphthylamin disulfo- Brown-orange Orange-brown.

ac 2.5.7 ri1aphthy1amin disulfo- Brown-orange.-. Brown-orange.

aci

2.6.8 gaphthylamin disulfo- Dull brown Yellow-brown.

aci

1.4 naphthol sulto-acid Red Brown-red.

2.6 naphthol sulto-acid Red Brown-red.

1.4.7 naphthol disulfo-acid.. Red Brown.

1.4.8 naphthol disulfo-acid.. Red. Brown.

2.3.6 naphthol disulfo-acid. B11181 BlOWA1ViO1Gt.

1.5 napththylene-diainin Brown... Brown.

sulfo-acid.

1.5 naphthylene-diamin. Dull brown Brown.

1.5.7 amido-naphthol sulfo- Violet Violetbr0wn.

acid, (combined in a1kaline solution.)

1.5.7 amiclo-naphthol snlfo- Brown-violet.. Brown.

acid, (combined in acid solution.)

1.8.4 amido-naphthol sulfo- Violet Olive-brown. acid, (combined in acid solution.)

1.8.5 amido-naplithol sulfo- Reddish blue Olive-brown.

acid, (combined in alkaline solution.)

2.5.7 amido-naphthol snlfo- Red Sad red.

acid, (combined in alkaline solution.)

2.5.7 amido-naphthol sulfo- Bi'ownish red.. Red-brown.

acid, (combined in acid solution.)

2.8.6 amido-naphthol snlfo- Brown-violet Brown.

acid, (combined in alkaline solution.)

2 8.6 amido-naphthol sulfo- Brown-red Brown.

acid, (combined in acid solution.)

1.8.4 dihydroxy-naphtha- Violet Olive-brown.

lene sulfo-acid.

Now what we claim is l. The process for the manufacture of mixed disazo coloringmatters by converting 1.5 naphthylene diamin into its tetrazo compound and combining one molecular proportion of this tetrazo compound with one molecular proportion of salicylic acid and subsequently combining the intermediate product thus obtained with an azo component other than salicylic acid, all substantially as described.

2. As a new article of manufacture a mixed disazo coloring-matter which dyes chromemordanted wool yielding shades which possess a high degree of fastness against fulling and which upon reduction yields 1.5 naphthylene-diamin, amido-salicylic acid, and a reduction product due to the azo component other than salicylic acid chosen, all substantially as described.

3. As anew article of manufacture a mixed disazo coloring-matter of the formula salicylic acid 1.5 naphthylene-diamin a hthol sulfo add which dyes chrome-mordanted wool yielding shades which possess a high degree of fastness against fulling and which upon reduction yields 1.5 naphthylene-diamin, amid0- salicylic acid and an amido-naphthol sulfuacid, substantially as described.

4. As a new article of manufacture the mixed disazo coloring-matter of the formula salicylic acid 1.5 naphthylene-diamin 2inaphthol-3.Gdisulfo-acid 

